They also searched a creek adjacent Kelso Park South and Marco Reserve and released CCTV footage.
Hamzy, 44, was shot about 7.30am on Monday, October 19, 2020, and despite efforts of emergency services, he died at the scene.
A grey Toyota RAV4, believed to be used in the murder, was found burned out in nearby Colechin Street.
A 38-year-old man has been charged in relation to the incident and remains before the courts.
Police also released CCTV footage, depicting a sequence of events prior to and after the shooting: including three vehicles – a black Mercedes-Benz AMG CLA45, grey Toyota RAV4, and white BMW 328i – travelling in convoy on Edgar Street, Condell Park.
They are also after information about two men in dark clothing walking together at Kelso Park bicycle track about 8.10am and a short time later, two men walking together through Kelso Park South carpark towards Marco Avenue.
One of the men was wearing a distinctive black and grey hoody with dark pants. The other man was wearing a dark coloured hoody with three distinctive stripes on the back, dark track pants with white writing on the leg and very white shoes.
Detectives believe the two men can assist with their inquiries. They are also appealing for anyone with information relating to the black Mercedes-Benz to come forward.
Criminal Groups Squad Commander, Detective Acting Superintendent Chris Goddard says detectives believe the two men appear familiar with the local area.
“Their movements lead us to believe that both men know the area very well and may reside nearby, so we ask anyone from around East Hills and Panania to take a look at this footage, because you might recognise them,” Det A/Supt Goddard said.
“One of the men has been dubbed ‘Mr Blond’, because you can see he has blond hair when his hood slips off his head while he’s running.
“We believe both these men can assist our inquiries and would like to speak with them.”
Anyone with information that may assist investigators is urged to contact Crime Stoppers: 1800 333 000.
